186 BRITISH FOSSIL VERTED RAL. 
SPHENACANTHUS serrulatus (cov/iiued)— 
Ctenacanthus ? serrulatus, R. H. Traquair, Geol. Mag. [3] vol. 1, 
1884, p. 6. 
Loc. Calcif. Sandst.; Burdiehouse, near Edinburgh. [Spine ; 
Edinburgh Mus. | 
sp., A. S. Woodward, Cat. Foss. Fishes B. M., pt. i, 1889, p. 244. 
Loc. U. Coal-Meas. (Ardwick Limest.); Ardwick, near Man- 
chester. [Spine; Brit. Mus.,no. 41251 @.] 
SPHENONCHUS, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 201. 
A provisional genus founded upon head-spines of /ydodus 
(E. Charlesworth, Mag. Nat. Hist., n.s., vol. iii, 1839, p. 242), 
Acrodus (A. S. Woodward, Cat. Foss. Fishes B. M., pt. 1, 
1889, p. 290), and Asteracanthus (A. S. Woodward, Ann. 
Mag. Nat. Hist. [6] vol. 11, 1888, p. 340). Said to have been 
originally named Le/osfhen in collections (L. Agassiz, Poiss. 
Foss., vol. iii (1843), p. 201). 
clongatus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 202, pl. xxii, 
f. 18; J. Morris, Cat. Brit. Foss., 1854, p. 344. 
Loc. Wealden ; Sussex. [Spine ; Brit. Mus.] 
hamatus, L. Agassiz, Poiss. Foss., vol. iii (1843), p. 202, pl. xxii a, 
f. 12-14; J. Morris, Cat. Brit. Foss., 1854, p. 344. ‘ Tooth,’ 
H. T. De La Beche, Trans. Geol. Soc. [2] vol. i (1822), p. 44, 
pl. iv, f. 4,5; W. Buckland, Geol. and Mineral., ed. 2 (1837), 
pl xxvil'd, £0,'7- 
Loc, L;-Lias; Lyme Regis. [Spine] T. 
martini, Agassiz. v. Hybodus lawsoni. 
(Hybodus) obtusus, J. W. Davis, Quart. Journ. Geol. Soc., 
vol. xxxvii, 1881, p. 420, pl. xxii, f. 7. 
Loc. Rhetic; Aust Cliff, near Bristol. [Spine ; J. W. Davis 
Coll. | 
sp: ‘Tooth of Fish? T. Webster, Trans. Geol. Soc. [2] vol. ii 
(1826), p. 35, pl. vi, f. 8. 
Loc. Wealden; Sussex. [Spine.] 
sp. Recorded from Lias of Weston, near Bath, and Wealden of 
Isle of Wight (E. Charlesworth and H. Woods, Mag. Nat. 
Hist., n.s., vol. ii, 1839, pp. 279, 282): also from Kimeridge 
Clay, Weymouth; Purbeck Beds, Swanage ; Wealden, 
Sussex; and Grey Chalk, Dover (A. S. Woodward, Cat. 
Foss. Fishes B. M., pt. i, 1889, pp. 303, 305). 
SPHYR-ENODUS, Agassiz. v. Dictyodus. 
crassidens, Agassiz. v. Dictyodus crassidens. 
gracilis, Dixon. v. Dictyodus tenuis. 
priscus, Agassiz. v. Dictyodus priscus. 
tenuis, Dixon. v. Dictyodus tenuis. 
